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<h1 id="sec_name">
<span data-if="hdevelop" style="display:inline;">boundary</span><span data-if="c" style="display:none;">boundary</span><span data-if="cpp" style="display:none;">Boundary</span><span data-if="dotnet" style="display:none;">Boundary</span><span data-if="python" style="display:none;">boundary</span> (算子名称)</h1>
<h2>名称</h2>
<p><code><span data-if="hdevelop" style="display:inline;">boundary</span><span data-if="c" style="display:none;">boundary</span><span data-if="cpp" style="display:none;">Boundary</span><span data-if="dotnet" style="display:none;">Boundary</span><span data-if="python" style="display:none;">boundary</span></code> — Reduce a region to its boundary.</p>
<h2 id="sec_synopsis">参数签名</h2>
<div data-if="hdevelop" style="display:inline;">
<p>
<code><b>boundary</b>(<a href="#Region"><i>区域</i></a> : <a href="#RegionBorder"><i>RegionBorder</i></a> : <a href="#BoundaryType"><i>BoundaryType</i></a> : )</code></p>
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<div data-if="c" style="display:none;">
<p>
<code>Herror <b>boundary</b>(const Hobject <a href="#Region"><i>区域</i></a>, Hobject* <a href="#RegionBorder"><i>RegionBorder</i></a>, const char* <a href="#BoundaryType"><i>BoundaryType</i></a>)</code></p>
<p>
<code>Herror <b>T_boundary</b>(const Hobject <a href="#Region"><i>区域</i></a>, Hobject* <a href="#RegionBorder"><i>RegionBorder</i></a>, const Htuple <a href="#BoundaryType"><i>BoundaryType</i></a>)</code></p>
</div>
<div data-if="cpp" style="display:none;">
<p>
<code>void <b>Boundary</b>(const HObject&amp; <a href="#Region"><i>区域</i></a>, HObject* <a href="#RegionBorder"><i>RegionBorder</i></a>, const HTuple&amp; <a href="#BoundaryType"><i>BoundaryType</i></a>)</code></p>
<p>
<code><a href="HRegion.html">HRegion</a> <a href="HRegion.html">HRegion</a>::<b>Boundary</b>(const HString&amp; <a href="#BoundaryType"><i>BoundaryType</i></a>) const</code></p>
<p>
<code><a href="HRegion.html">HRegion</a> <a href="HRegion.html">HRegion</a>::<b>Boundary</b>(const char* <a href="#BoundaryType"><i>BoundaryType</i></a>) const</code></p>
<p>
<code><a href="HRegion.html">HRegion</a> <a href="HRegion.html">HRegion</a>::<b>Boundary</b>(const wchar_t* <a href="#BoundaryType"><i>BoundaryType</i></a>) const  <span class="signnote">
            (
            Windows only)
          </span></code></p>
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<p>
<code>static void <a href="HOperatorSet.html">HOperatorSet</a>.<b>Boundary</b>(<a href="HObject.html">HObject</a> <a href="#Region"><i>区域</i></a>, out <a href="HObject.html">HObject</a> <a href="#RegionBorder"><i>regionBorder</i></a>, <a href="HTuple.html">HTuple</a> <a href="#BoundaryType"><i>boundaryType</i></a>)</code></p>
<p>
<code><a href="HRegion.html">HRegion</a> <a href="HRegion.html">HRegion</a>.<b>Boundary</b>(string <a href="#BoundaryType"><i>boundaryType</i></a>)</code></p>
</div>
<div data-if="python" style="display:none;">
<p>
<code>def <b>boundary</b>(<a href="#Region"><i>区域</i></a>: HObject, <a href="#BoundaryType"><i>boundary_type</i></a>: str) -&gt; HObject</code></p>
</div>
<h2 id="sec_description">描述</h2>
<p><code><span data-if="hdevelop" style="display:inline">boundary</span><span data-if="c" style="display:none">boundary</span><span data-if="cpp" style="display:none">Boundary</span><span data-if="com" style="display:none">Boundary</span><span data-if="dotnet" style="display:none">Boundary</span><span data-if="python" style="display:none">boundary</span></code> computes the boundary of each input region in
<a href="#Region"><i><code><span data-if="hdevelop" style="display:inline">区域</span><span data-if="c" style="display:none">区域</span><span data-if="cpp" style="display:none">区域</span><span data-if="com" style="display:none">区域</span><span data-if="dotnet" style="display:none">区域</span><span data-if="python" style="display:none">区域</span></code></i></a> and returns them in <a href="#RegionBorder"><i><code><span data-if="hdevelop" style="display:inline">RegionBorder</span><span data-if="c" style="display:none">RegionBorder</span><span data-if="cpp" style="display:none">RegionBorder</span><span data-if="com" style="display:none">RegionBorder</span><span data-if="dotnet" style="display:none">regionBorder</span><span data-if="python" style="display:none">region_border</span></code></i></a>.
The parameter <a href="#BoundaryType"><i><code><span data-if="hdevelop" style="display:inline">BoundaryType</span><span data-if="c" style="display:none">BoundaryType</span><span data-if="cpp" style="display:none">BoundaryType</span><span data-if="com" style="display:none">BoundaryType</span><span data-if="dotnet" style="display:none">boundaryType</span><span data-if="python" style="display:none">boundary_type</span></code></i></a> determines the type of boundary
computation.
</p>
<p>The contour computation is done using morphological operations.
The resulting output regions consist only of the minimal border of the input
regions. Their positions depend on the value of <a href="#BoundaryType"><i><code><span data-if="hdevelop" style="display:inline">BoundaryType</span><span data-if="c" style="display:none">BoundaryType</span><span data-if="cpp" style="display:none">BoundaryType</span><span data-if="com" style="display:none">BoundaryType</span><span data-if="dotnet" style="display:none">boundaryType</span><span data-if="python" style="display:none">boundary_type</span></code></i></a>,
accepting the following values:
</p>
<ul>
<li>
<p> <i><span data-if="hdevelop" style="display:inline">'inner'</span><span data-if="c" style="display:none">"inner"</span><span data-if="cpp" style="display:none">"inner"</span><span data-if="com" style="display:none">"inner"</span><span data-if="dotnet" style="display:none">"inner"</span><span data-if="python" style="display:none">"inner"</span></i>: The contour lies within the original region.
</p>
</li>
<li>
<p> <i><span data-if="hdevelop" style="display:inline">'inner_filled'</span><span data-if="c" style="display:none">"inner_filled"</span><span data-if="cpp" style="display:none">"inner_filled"</span><span data-if="com" style="display:none">"inner_filled"</span><span data-if="dotnet" style="display:none">"inner_filled"</span><span data-if="python" style="display:none">"inner_filled"</span></i>: The contour lies within the original
region, holes in the interior of the input region are suppressed.
Due to algorithm optimization this contours may slightly differ
from corresponding ones obtained with <i><span data-if="hdevelop" style="display:inline">'inner'</span><span data-if="c" style="display:none">"inner"</span><span data-if="cpp" style="display:none">"inner"</span><span data-if="com" style="display:none">"inner"</span><span data-if="dotnet" style="display:none">"inner"</span><span data-if="python" style="display:none">"inner"</span></i>.
</p>
</li>
<li>
<p> <i><span data-if="hdevelop" style="display:inline">'outer'</span><span data-if="c" style="display:none">"outer"</span><span data-if="cpp" style="display:none">"outer"</span><span data-if="com" style="display:none">"outer"</span><span data-if="dotnet" style="display:none">"outer"</span><span data-if="python" style="display:none">"outer"</span></i>: The contour is one pixel outside of the original
region.
</p>
</li>
</ul>
<h2 id="sec_execution">运行信息</h2>
<ul>
  <li>多线程类型:可重入(与非独占操作符并行运行)。</li>
<li>多线程作用域:全局(可以从任何线程调用)。</li>
  
    <li>在元组级别自动并行化。</li>
  
</ul>
<h2 id="sec_parameters">参数表</h2>
  <div class="par">
<div class="parhead">
<span id="Region" class="parname"><b><code><span data-if="hdevelop" style="display:inline">区域</span><span data-if="c" style="display:none">区域</span><span data-if="cpp" style="display:none">区域</span><span data-if="com" style="display:none">区域</span><span data-if="dotnet" style="display:none">区域</span><span data-if="python" style="display:none">区域</span></code></b> (input_object)  </span><span>region(-array) <code>→</code> <span data-if="hdevelop" style="display:inline">object</span><span data-if="dotnet" style="display:none"><a href="HRegion.html">HRegion</a></span><span data-if="python" style="display:none">HObject</span><span data-if="cpp" style="display:none"><a href="HRegion.html">HRegion</a></span><span data-if="c" style="display:none">Hobject</span></span>
</div>
<p class="pardesc">Regions for which the boundary is to be computed.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="RegionBorder" class="parname"><b><code><span data-if="hdevelop" style="display:inline">RegionBorder</span><span data-if="c" style="display:none">RegionBorder</span><span data-if="cpp" style="display:none">RegionBorder</span><span data-if="com" style="display:none">RegionBorder</span><span data-if="dotnet" style="display:none">regionBorder</span><span data-if="python" style="display:none">region_border</span></code></b> (output_object)  </span><span>region(-array) <code>→</code> <span data-if="hdevelop" style="display:inline">object</span><span data-if="dotnet" style="display:none"><a href="HRegion.html">HRegion</a></span><span data-if="python" style="display:none">HObject</span><span data-if="cpp" style="display:none"><a href="HRegion.html">HRegion</a></span><span data-if="c" style="display:none">Hobject *</span></span>
</div>
<p class="pardesc">Resulting boundaries.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="BoundaryType" class="parname"><b><code><span data-if="hdevelop" style="display:inline">BoundaryType</span><span data-if="c" style="display:none">BoundaryType</span><span data-if="cpp" style="display:none">BoundaryType</span><span data-if="com" style="display:none">BoundaryType</span><span data-if="dotnet" style="display:none">boundaryType</span><span data-if="python" style="display:none">boundary_type</span></code></b> (input_control)  </span><span>string <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">str</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (string)</span><span data-if="dotnet" style="display:none"> (<i>string</i>)</span><span data-if="cpp" style="display:none"> (<i>HString</i>)</span><span data-if="c" style="display:none"> (<i>char*</i>)</span></span>
</div>
<p class="pardesc">Boundary type.</p>
<p class="pardesc"><span class="parcat">Default:
      </span>
    <span data-if="hdevelop" style="display:inline">'inner'</span>
    <span data-if="c" style="display:none">"inner"</span>
    <span data-if="cpp" style="display:none">"inner"</span>
    <span data-if="com" style="display:none">"inner"</span>
    <span data-if="dotnet" style="display:none">"inner"</span>
    <span data-if="python" style="display:none">"inner"</span>
</p>
<p class="pardesc"><span class="parcat">List of values:
      </span><span data-if="hdevelop" style="display:inline">'inner'</span><span data-if="c" style="display:none">"inner"</span><span data-if="cpp" style="display:none">"inner"</span><span data-if="com" style="display:none">"inner"</span><span data-if="dotnet" style="display:none">"inner"</span><span data-if="python" style="display:none">"inner"</span>, <span data-if="hdevelop" style="display:inline">'inner_filled'</span><span data-if="c" style="display:none">"inner_filled"</span><span data-if="cpp" style="display:none">"inner_filled"</span><span data-if="com" style="display:none">"inner_filled"</span><span data-if="dotnet" style="display:none">"inner_filled"</span><span data-if="python" style="display:none">"inner_filled"</span>, <span data-if="hdevelop" style="display:inline">'outer'</span><span data-if="c" style="display:none">"outer"</span><span data-if="cpp" style="display:none">"outer"</span><span data-if="com" style="display:none">"outer"</span><span data-if="dotnet" style="display:none">"outer"</span><span data-if="python" style="display:none">"outer"</span></p>
</div>
<div data-if="hdevelop" style="display:inline">
<h2 id="sec_example_hdevelop">Example (C++ (HALCON 5.0-10.0))</h2>
<pre class="example">
#include "HalconCpp.h"
using namespace Halcon;

main()
{
  HWindow  w;
  HRegion  circ1 = HRegion::GenCircle (20, 10, 10.5);

  circ1.Display (w);
  w.Click ();

  HRegion marg1 = circ1.Boundary ("inner");
  w.SetColor ("red");
  marg1.Display (w);
  w.Click ();

  return(0);
}
</pre>
</div>
<div data-if="c" style="display:none">
<h2 id="sec_example_c">例程 (C)</h2>
<pre class="example">
/* Intersections of two circles: */
gen_circle(&amp;Circle1,200.0,100.0,100.5);
gen_circle(&amp;Circle2,200.0,150.0,100.5);
boundary(Circle1,&amp;Margin1,"inner");
boundary(Circle2,&amp;Margin2,"inner");
intersection(Margin1,Margin2,&amp;Intersections);
connection(Intersections,&amp;Single);
T_area_center(Single,NULL,&amp;Rows,&amp;Columns);

/* simulation of Mode 'inner' */
void inner(Hobject Region, Hobject *Border)
{
  Hobject  Smaller;
  erosion_circle(Region,&amp;Smaller,1.5);
  difference(Region,Smaller,Border);
}
</pre>
</div>
<div data-if="cpp" style="display:none">
<h2 id="sec_example_cpp">Example (C++ (HALCON 5.0-10.0))</h2>
<pre class="example">
#include "HalconCpp.h"
using namespace Halcon;

main()
{
  HWindow  w;
  HRegion  circ1 = HRegion::GenCircle (20, 10, 10.5);

  circ1.Display (w);
  w.Click ();

  HRegion marg1 = circ1.Boundary ("inner");
  w.SetColor ("red");
  marg1.Display (w);
  w.Click ();

  return(0);
}
</pre>
</div>
<div data-if="com" style="display:none">
<h2 id="sec_example_com">Example (C++ (HALCON 5.0-10.0))</h2>
<pre class="example">
#include "HalconCpp.h"
using namespace Halcon;

main()
{
  HWindow  w;
  HRegion  circ1 = HRegion::GenCircle (20, 10, 10.5);

  circ1.Display (w);
  w.Click ();

  HRegion marg1 = circ1.Boundary ("inner");
  w.SetColor ("red");
  marg1.Display (w);
  w.Click ();

  return(0);
}
</pre>
</div>
<div data-if="dotnet" style="display:none">
<h2 id="sec_example_dotnet">Example (C++ (HALCON 5.0-10.0))</h2>
<pre class="example">
#include "HalconCpp.h"
using namespace Halcon;

main()
{
  HWindow  w;
  HRegion  circ1 = HRegion::GenCircle (20, 10, 10.5);

  circ1.Display (w);
  w.Click ();

  HRegion marg1 = circ1.Boundary ("inner");
  w.SetColor ("red");
  marg1.Display (w);
  w.Click ();

  return(0);
}
</pre>
</div>
<h2 id="sec_complexity">Complexity</h2>
<p>Let A be the area of the input region.  Then the runtime
complexity for one region is
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    </g>
    <g transform="scale(0.009963,0.009963)" id="GLYPHcmr10_41">
      <path style="fill-rule: evenodd;" d="M289.000000 -250.000000C289.000000 -328.000000,278.000000 -449.000000,223.000000 -562.000000C163.000000 -685.000000,77.000000 -750.000000,67.000000 -750.000000C61.000000 -750.000000,57.000000 -746.000000,57.000000 -740.000000C57.000000 -737.000000,57.000000 -735.000000,76.000000 -717.000000C174.000000 -618.000000,231.000000 -459.000000,231.000000 -250.000000C231.000000 -79.000000,194.000000 97.000000,70.000000 223.000000C57.000000 235.000000,57.000000 237.000000,57.000000 240.000000C57.000000 246.000000,61.000000 250.000000,67.000000 250.000000C77.000000 250.000000,167.000000 182.000000,226.000000 55.000000C277.000000 -55.000000,289.000000 -166.000000,289.000000 -250.000000"></path>
    </g>
    <g transform="scale(0.009963,0.009963)" id="GLYPHcmr10_51">
      <path style="fill-rule: evenodd;" d="M290.000000 -352.000000C372.000000 -379.000000,430.000000 -449.000000,430.000000 -528.000000C430.000000 -610.000000,342.000000 -666.000000,246.000000 -666.000000C145.000000 -666.000000,69.000000 -606.000000,69.000000 -530.000000C69.000000 -497.000000,91.000000 -478.000000,120.000000 -478.000000C151.000000 -478.000000,171.000000 -500.000000,171.000000 -529.000000C171.000000 -579.000000,124.000000 -579.000000,109.000000 -579.000000C140.000000 -628.000000,206.000000 -641.000000,242.000000 -641.000000C283.000000 -641.000000,338.000000 -619.000000,338.000000 -529.000000C338.000000 -517.000000,336.000000 -459.000000,310.000000 -415.000000C280.000000 -367.000000,246.000000 -364.000000,221.000000 -363.000000C213.000000 -362.000000,189.000000 -360.000000,182.000000 -360.000000C174.000000 -359.000000,167.000000 -358.000000,167.000000 -348.000000C167.000000 -337.000000,174.000000 -337.000000,191.000000 -337.000000L235.000000 -337.000000C317.000000 -337.000000,354.000000 -269.000000,354.000000 -171.000000C354.000000 -35.000000,285.000000 -6.000000,241.000000 -6.000000C198.000000 -6.000000,123.000000 -23.000000,88.000000 -82.000000C123.000000 -77.000000,154.000000 -99.000000,154.000000 -137.000000C154.000000 -173.000000,127.000000 -193.000000,98.000000 -193.000000C74.000000 -193.000000,42.000000 -179.000000,42.000000 -135.000000C42.000000 -44.000000,135.000000 22.000000,244.000000 22.000000C366.000000 22.000000,457.000000 -69.000000,457.000000 -171.000000C457.000000 -253.000000,394.000000 -331.000000,290.000000 -352.000000"></path>
    </g>
    <g transform="scale(0.009963,0.009963)" id="GLYPHcmsy10_112">
      <path style="fill-rule: evenodd;" d="M389.000000 855.000000L213.000000 466.000000C206.000000 450.000000,201.000000 450.000000,198.000000 450.000000C197.000000 450.000000,192.000000 450.000000,181.000000 458.000000L86.000000 530.000000C73.000000 540.000000,73.000000 543.000000,73.000000 546.000000C73.000000 551.000000,76.000000 557.000000,83.000000 557.000000C89.000000 557.000000,106.000000 543.000000,117.000000 535.000000C123.000000 530.000000,138.000000 519.000000,149.000000 511.000000L346.000000 944.000000C353.000000 960.000000,358.000000 960.000000,367.000000 960.000000C382.000000 960.000000,385.000000 954.000000,392.000000 940.000000L846.000000 -0.000000C853.000000 -14.000000,853.000000 -18.000000,853.000000 -20.000000C853.000000 -30.000000,845.000000 -40.000000,833.000000 -40.000000C825.000000 -40.000000,818.000000 -35.000000,810.000000 -19.000000"></path>
    </g>
    <g transform="scale(0.009963,0.009963)" id="GLYPHcmmi10_58">
      <path style="fill-rule: evenodd;" d="M192.000000 -53.000000C192.000000 -82.000000,168.000000 -106.000000,139.000000 -106.000000C110.000000 -106.000000,86.000000 -82.000000,86.000000 -53.000000C86.000000 -24.000000,110.000000 -0.000000,139.000000 -0.000000C168.000000 -0.000000,192.000000 -24.000000,192.000000 -53.000000"></path>
    </g>
    <g transform="scale(0.009963,0.009963)" id="GLYPHcmmi10_65">
      <path style="fill-rule: evenodd;" d="M179.000000 -115.000000C139.000000 -48.000000,100.000000 -34.000000,56.000000 -31.000000C44.000000 -30.000000,35.000000 -30.000000,35.000000 -11.000000C35.000000 -5.000000,40.000000 -0.000000,48.000000 -0.000000L134.000000 -0.000000L75.000000 -0.000000L106.000000 -3.000000L134.000000 -3.000000L167.000000 -3.000000L202.000000 -0.000000L234.000000 -0.000000C240.000000 -0.000000,253.000000 -0.000000,253.000000 -19.000000C253.000000 -30.000000,244.000000 -31.000000,237.000000 -31.000000C214.000000 -33.000000,190.000000 -41.000000,190.000000 -66.000000C190.000000 -78.000000,196.000000 -89.000000,204.000000 -103.000000L280.000000 -231.000000L531.000000 -231.000000C533.000000 -210.000000,547.000000 -74.000000,547.000000 -64.000000C547.000000 -34.000000,495.000000 -31.000000,475.000000 -31.000000C461.000000 -31.000000,451.000000 -31.000000,451.000000 -11.000000C451.000000 -0.000000,463.000000 -0.000000,465.000000 -0.000000L590.000000 -0.000000L506.000000 -0.000000L549.000000 -3.000000L590.000000 -3.000000L615.000000 -3.000000L678.000000 -0.000000L703.000000 -0.000000C709.000000 -0.000000,721.000000 -0.000000,721.000000 -20.000000C721.000000 -31.000000,711.000000 -31.000000,698.000000 -31.000000C636.000000 -31.000000,636.000000 -38.000000,633.000000 -67.000000L572.000000 -692.000000C570.000000 -712.000000,570.000000 -716.000000,553.000000 -716.000000C537.000000 -716.000000,533.000000 -709.000000,527.000000 -699.000000M299.000000 -262.000000L496.000000 -592.000000L528.000000 -262.000000"></path>
    </g>
    <g transform="scale(0.009963,0.009963)" id="GLYPHcmmi10_79">
      <path style="fill-rule: evenodd;" d="M740.000000 -436.000000C740.000000 -597.000000,634.000000 -705.000000,485.000000 -705.000000C269.000000 -705.000000,49.000000 -478.000000,49.000000 -245.000000C49.000000 -79.000000,161.000000 22.000000,305.000000 22.000000C517.000000 22.000000,740.000000 -197.000000,740.000000 -436.000000M311.000000 -4.000000C212.000000 -4.000000,142.000000 -85.000000,142.000000 -217.000000C142.000000 -261.000000,156.000000 -407.000000,233.000000 -524.000000C302.000000 -628.000000,400.000000 -680.000000,479.000000 -680.000000C561.000000 -680.000000,651.000000 -624.000000,651.000000 -475.000000C651.000000 -403.000000,624.000000 -247.000000,525.000000 -124.000000C477.000000 -63.000000,395.000000 -4.000000,311.000000 -4.000000"></path>
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  <g transform="matrix(1.600006,-0.000000,-0.000000,1.600006,0.696671 15.782166)" style="fill: rgb(0.000000%,0.000000%,0.000000%);">
    <use xlink:href="#GLYPHcmmi10_79"></use>
  </g>
  <g transform="matrix(1.600006,-0.000000,-0.000000,1.600006,13.298325 15.782166)" style="fill: rgb(0.000000%,0.000000%,0.000000%);">
    <use xlink:href="#GLYPHcmr10_40"></use>
    <use xlink:href="#GLYPHcmr10_51" x="3.888963"></use>
  </g>
  <g transform="matrix(1.600006,-0.000000,-0.000000,1.600006,27.467499 1.507874)" style="fill: rgb(0.000000%,0.000000%,0.000000%);">
    <use xlink:href="#GLYPHcmsy10_112"></use>
  </g>
  <path d="M40.751068 1.189148L52.706314 1.189148" style="stroke:rgb(0.000000%,0.000000%,0.000000%); stroke-width: 0.637604;stroke-linejoin: round;stroke-miterlimit: 10.000000;fill: none;"></path>
  <g transform="matrix(1.600006,-0.000000,-0.000000,1.600006,40.751068 15.782166)" style="fill: rgb(0.000000%,0.000000%,0.000000%);">
    <use xlink:href="#GLYPHcmmi10_65"></use>
  </g>
  <g transform="matrix(1.600006,-0.000000,-0.000000,1.600006,52.706314 15.782166)" style="fill: rgb(0.000000%,0.000000%,0.000000%);">
    <use xlink:href="#GLYPHcmr10_41"></use>
  </g>
  <g transform="matrix(1.600006,-0.000000,-0.000000,1.600006,66.875488 15.782166)" style="fill: rgb(0.000000%,0.000000%,0.000000%);">
    <use xlink:href="#GLYPHcmmi10_58"></use>
  </g>
</svg></span></p>
<h2 id="sec_result">结果</h2>
<p><code><span data-if="hdevelop" style="display:inline">boundary</span><span data-if="c" style="display:none">boundary</span><span data-if="cpp" style="display:none">Boundary</span><span data-if="com" style="display:none">Boundary</span><span data-if="dotnet" style="display:none">Boundary</span><span data-if="python" style="display:none">boundary</span></code> returns <TT>2</TT> (
      <TT>H_MSG_TRUE</TT>)
     if all parameters are correct.  The
behavior in case of empty or no input region can be set via:
</p>
<ul>
<li>
<p> no region:
<a href="set_system.html"><code><span data-if="hdevelop" style="display:inline">set_system('no_object_result',&lt;RegionResult&gt;)</span><span data-if="c" style="display:none">set_system("no_object_result",&lt;RegionResult&gt;)</span><span data-if="cpp" style="display:none">SetSystem("no_object_result",&lt;RegionResult&gt;)</span><span data-if="com" style="display:none">SetSystem("no_object_result",&lt;RegionResult&gt;)</span><span data-if="dotnet" style="display:none">SetSystem("no_object_result",&lt;RegionResult&gt;)</span><span data-if="python" style="display:none">set_system("no_object_result",&lt;RegionResult&gt;)</span></code></a>
</p>
</li>
<li>
<p> empty region:
<a href="set_system.html"><code><span data-if="hdevelop" style="display:inline">set_system('empty_region_result',&lt;RegionResult&gt;)</span><span data-if="c" style="display:none">set_system("empty_region_result",&lt;RegionResult&gt;)</span><span data-if="cpp" style="display:none">SetSystem("empty_region_result",&lt;RegionResult&gt;)</span><span data-if="com" style="display:none">SetSystem("empty_region_result",&lt;RegionResult&gt;)</span><span data-if="dotnet" style="display:none">SetSystem("empty_region_result",&lt;RegionResult&gt;)</span><span data-if="python" style="display:none">set_system("empty_region_result",&lt;RegionResult&gt;)</span></code></a>
</p>
</li>
</ul>

<p>Otherwise, an exception is raised.</p>
<h2 id="sec_predecessors">可能的前置算子</h2>
<p>
<code><a href="threshold.html"><span data-if="hdevelop" style="display:inline">threshold</span><span data-if="c" style="display:none">threshold</span><span data-if="cpp" style="display:none">Threshold</span><span data-if="com" style="display:none">Threshold</span><span data-if="dotnet" style="display:none">Threshold</span><span data-if="python" style="display:none">threshold</span></a></code>, 
<code><a href="regiongrowing.html"><span data-if="hdevelop" style="display:inline">regiongrowing</span><span data-if="c" style="display:none">regiongrowing</span><span data-if="cpp" style="display:none">Regiongrowing</span><span data-if="com" style="display:none">Regiongrowing</span><span data-if="dotnet" style="display:none">Regiongrowing</span><span data-if="python" style="display:none">regiongrowing</span></a></code>, 
<code><a href="connection.html"><span data-if="hdevelop" style="display:inline">connection</span><span data-if="c" style="display:none">connection</span><span data-if="cpp" style="display:none">Connection</span><span data-if="com" style="display:none">Connection</span><span data-if="dotnet" style="display:none">Connection</span><span data-if="python" style="display:none">connection</span></a></code>, 
<code><a href="union1.html"><span data-if="hdevelop" style="display:inline">union1</span><span data-if="c" style="display:none">union1</span><span data-if="cpp" style="display:none">Union1</span><span data-if="com" style="display:none">Union1</span><span data-if="dotnet" style="display:none">Union1</span><span data-if="python" style="display:none">union1</span></a></code>, 
<code><a href="watersheds.html"><span data-if="hdevelop" style="display:inline">watersheds</span><span data-if="c" style="display:none">watersheds</span><span data-if="cpp" style="display:none">Watersheds</span><span data-if="com" style="display:none">Watersheds</span><span data-if="dotnet" style="display:none">Watersheds</span><span data-if="python" style="display:none">watersheds</span></a></code>, 
<code><a href="class_ndim_norm.html"><span data-if="hdevelop" style="display:inline">class_ndim_norm</span><span data-if="c" style="display:none">class_ndim_norm</span><span data-if="cpp" style="display:none">ClassNdimNorm</span><span data-if="com" style="display:none">ClassNdimNorm</span><span data-if="dotnet" style="display:none">ClassNdimNorm</span><span data-if="python" style="display:none">class_ndim_norm</span></a></code>
</p>
<h2 id="sec_successors">可能的后置算子</h2>
<p>
<code><a href="reduce_domain.html"><span data-if="hdevelop" style="display:inline">reduce_domain</span><span data-if="c" style="display:none">reduce_domain</span><span data-if="cpp" style="display:none">ReduceDomain</span><span data-if="com" style="display:none">ReduceDomain</span><span data-if="dotnet" style="display:none">ReduceDomain</span><span data-if="python" style="display:none">reduce_domain</span></a></code>, 
<code><a href="select_shape.html"><span data-if="hdevelop" style="display:inline">select_shape</span><span data-if="c" style="display:none">select_shape</span><span data-if="cpp" style="display:none">SelectShape</span><span data-if="com" style="display:none">SelectShape</span><span data-if="dotnet" style="display:none">SelectShape</span><span data-if="python" style="display:none">select_shape</span></a></code>, 
<code><a href="area_center.html"><span data-if="hdevelop" style="display:inline">area_center</span><span data-if="c" style="display:none">area_center</span><span data-if="cpp" style="display:none">AreaCenter</span><span data-if="com" style="display:none">AreaCenter</span><span data-if="dotnet" style="display:none">AreaCenter</span><span data-if="python" style="display:none">area_center</span></a></code>, 
<code><a href="connection.html"><span data-if="hdevelop" style="display:inline">connection</span><span data-if="c" style="display:none">connection</span><span data-if="cpp" style="display:none">Connection</span><span data-if="com" style="display:none">Connection</span><span data-if="dotnet" style="display:none">Connection</span><span data-if="python" style="display:none">connection</span></a></code>
</p>
<h2 id="sec_alternatives">可替代算子</h2>
<p>
<code><a href="dilation_circle.html"><span data-if="hdevelop" style="display:inline">dilation_circle</span><span data-if="c" style="display:none">dilation_circle</span><span data-if="cpp" style="display:none">DilationCircle</span><span data-if="com" style="display:none">DilationCircle</span><span data-if="dotnet" style="display:none">DilationCircle</span><span data-if="python" style="display:none">dilation_circle</span></a></code>, 
<code><a href="erosion_circle.html"><span data-if="hdevelop" style="display:inline">erosion_circle</span><span data-if="c" style="display:none">erosion_circle</span><span data-if="cpp" style="display:none">ErosionCircle</span><span data-if="com" style="display:none">ErosionCircle</span><span data-if="dotnet" style="display:none">ErosionCircle</span><span data-if="python" style="display:none">erosion_circle</span></a></code>, 
<code><a href="difference.html"><span data-if="hdevelop" style="display:inline">difference</span><span data-if="c" style="display:none">difference</span><span data-if="cpp" style="display:none">Difference</span><span data-if="com" style="display:none">Difference</span><span data-if="dotnet" style="display:none">Difference</span><span data-if="python" style="display:none">difference</span></a></code>
</p>
<h2 id="sec_see">参考其它</h2>
<p>
<code><a href="fill_up.html"><span data-if="hdevelop" style="display:inline">fill_up</span><span data-if="c" style="display:none">fill_up</span><span data-if="cpp" style="display:none">FillUp</span><span data-if="com" style="display:none">FillUp</span><span data-if="dotnet" style="display:none">FillUp</span><span data-if="python" style="display:none">fill_up</span></a></code>
</p>
<h2 id="sec_module">模块</h2>
<p>
Foundation</p>
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